Hi, On November 19th My Boyfriend And I Attempted To

Hi, on November 19th my boyfriend and I attempted to have sex, but it was a struggle. He tried briefly without a condom, but I could barely take the pain so he pulled out and we stopped. I was worried that I had somehow gotten pregnant off his precum, even though he was barely in and it lasted five minutes aT the most. The day that happened was also the last day of my November period. The following month, I got my period like normal. But this month, I did not get my period, and am currently 13 days late. We tried having sex again a week ago, but it was protected and he didn't cum. Is there anyway I'm pregnant? And if not, why would I miss my period?